fix(package): update url-loader to version 0.6.2
fix(package): update url-loader to version 0.6.2

Closes #3338
mozilla/addons-frontend,aviarypl/mozilla-l10n-addons-frontend,tsl143/addons-frontend,aviarypl/mozilla-l10n-addons-frontend,kumar303/addons-frontend,aviarypl/mozilla-l10n-addons-frontend,kumar303/addons-frontend,kumar303/addons-frontend,kumar303/addons-frontend,mozilla/addons-frontend,mozilla/addons-frontend,aviarypl/mozilla-l10n-addons-frontend,tsl143/addons-frontend,mozilla/addons-frontend,tsl143/addons-frontend,tsl143/addons-frontend